4 bottles of Rugby Chest Congestion Relief Guaifenesin Oral Solution Cherry Flavor - 16 fl oz (TOTAL 64 fl oz). Active: Guaifenesin, USP 100mg - Expectorant. Guaifenesin, USP - 100 mg. Yes, guaifenesin is known as an expectorant, and one of its primary functions is to help loosen and thin mucus in the respiratory passages.
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